winget install --id Mozilla.Firefox.DeveloperEdition.trAbout Firefox Developer Edition (tr)
Get the latest features, fast performance, and the development tools you need to build for the open web using Firefox Browser Developer Edition.
What's new in 151.0
Version 151.0beta, first offered to Beta channel users on April 22, 2026 Firefox Beta gets updated 3 times a week and as a consequence, the release notes for the Beta channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports. Warning: Features listed here may or may not make a final release of Firefox. In addition to these release notes, you can follow ongoing development via the Firefox Trains website or our @FirefoxBeta Bluesky account. New - On macOS, URLs copied from iOS devices using Apple’s Universal Clipboard now paste correctly in Firefox. - HTML <select> dropdowns now display as an OS-native menu on macOS, aligning their appearance and behavior with the rest of the system. - The about:translations page is now accessible through the More Tools section of the Application Menu. - Address Autofill is enabled for users in the Netherlands. - With Firefox for Android you can now to swipe vertically over the toolbar to quickly see your list of tabs. - Private Browsing Mode now has a new privacy feature that allows users to instantly clear all data from their current private session without closing the entire browser. - Standard Enhanced Tracking Protection mode is getting increased protections against fingerprinting that limit the amount of information revealed about your computer and frustrating attempts to track you across websites. - Local profile backups are now available on macOS and Linux, with support for restoring them across platforms. - Local network access restrictions are now ro...
Version history
| Version | Updated | Notes |
|---|---|---|
| 151.0 | Unknown | Version 151.0beta, first offered to Beta channel users on April 22, 2026 Firefox Beta gets updated 3 times a week and as a consequence, the release notes for the Beta channel are updated continuously to reflect features... |
| 149.0 | Unknown | Version 149.0beta, first offered to Beta channel users on February 25, 2026 Firefox Beta gets updated 3 times a week and as a consequence, the release notes for the Beta channel are updated continuously to reflect featur... |
| 148.0 | Unknown | New - Firefox now has improved support for screen readers accessing mathematical formulas embedded in PDFs. - Firefox for Android introduces a refreshed toolbar with a modern design and improved customization support. -... |
| 147.0 | Unknown | New - WebGPU support is now enabled for all macOS versions on devices with Apple Silicon processors. - Zero copy video of hardware decoded video with AMD GPUs if supported, improving video playback performance on those s... |
| 146.0 | Unknown | New - When a website uses a file upload field (<input type=file>) without specifying what types of files it accepts, Firefox for Android will now offer additional options to make file uploads easier. Users will see choic... |
| 145.0 | Unknown | New - Copy Link to Highlight allows users to share arbitrary sections of page with others by copying a link through the context menu with a given selection. - Add, edit, and delete comments to make your own notes in PDFs... |
| 144.0 | Unknown | New - You can now close a Picture-in-Picture window without pausing the video. Press Shift + Click on the close button or use Shift + Esc to exit while keeping playback uninterrupted. - Logins in the Firefox Password Man... |
| 143.0 | Unknown | New - When a site asks for camera access, it can now be previewed in the permission dialog. This is especially helpful when switching between multiple cameras. - Tapping a persistent notification when Firefox for Android... |
| 142.0 | Unknown | New - On Windows, clicking a persistent notification when Firefox is closed or restarted, will now properly open Firefox with the relevant webpage, instead of just opening the main page of the website. - ETP-Strict mode... |
| 141.0 | Unknown | New - On Linux Firefox uses less memory and no longer requires a forced restart after an update has been applied by a package manager. - Firefox builds in Valencian now come with a built-in Catalan (Valencian variant) di... |
| 140.0 | Unknown | New - You can now unload tabs by right-clicking on a tab (or multiple selected tabs) and selecting "Unload Tab". This can be helpful in reducing Firefox's memory and CPU usage. - Firefox for Android now allows includes a... |
| 139.0 | Unknown | New - Full-Page Translations are now available within Firefox extension pages. Fixed - PNG images with transparency now keep their transparency when pasted into Firefox. - The upload performance of HTTP/3 been significan... |
| 138.0 | Unknown | New - Firefox for Android now supports TLS client authentication certificates. When a TLS server requests authentication from the browser, Firefox can now make use of the client certificates that have been added to your... |
| 137.0 | Unknown | New - Firefox now identifies all links in PDFs and turns them into hyperlinks. - Support HEVC playback on Linux. - You can now use the Firefox address bar as a calculator. Simply type in arithmetic expression and view th... |
| 136.0 | Unknown | New - On macOS, some background tasks will be moved to lower power cores resulting in less energy use. - Hardware-accelerated playback of HEVC video content is now supported on macOS. - Hardware video decoding is now ena... |
| 135.0 | Unknown | New - Users on macOS and Linux are now given the option to close only the current tab if the Quit keyboard shortcut is used while multiple tabs are open in the window. - Firefox now includes new safeguards to prevent sit... |
| 134.0 | Unknown | New - Firefox now supports touchpad hold gestures on Linux. This means that kinetic (momentum) scrolling can now be interrupted by placing two fingers on the touchpad. - HEVC hardware support is implemented for Windows u... |
| 133.0 | Unknown | New - You can now show tabs from other devices in the Tab overview menu. - Firefox now supports touchpad hold gestures on Linux. This means that kinetic (momentum) scrolling can now be interrupted by placing two fingers... |
| 132.0 | Unknown | New - Firefox now blocks third-party cookie access with Enhanced Tracking Protection's Strict mode. - WebRender hardware accelerated rendering is now enabled for most SVG Filter Primitives, improving performance of certa... |